Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add joelhooks/joelclaw --skill imsggit clone --depth 1 https://github.com/joelhooks/joelclawWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/joelhooks/joelclaw/imsg)<a href="https://agentmods.dev/skills/joelhooks/joelclaw/imsg"><img src="https://agentmods.dev/badge/skills/joelhooks/joelclaw/imsg/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/joelhooks/joelclaw/imsg"><img src="https://agentmods.dev/badge/skills/joelhooks/joelclaw/imsg.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00052 | $0.00984 |
| Opus 5.5 | $0.00021 | $0.00394 |
| Sonnet 5.5 | $0.00010 | $0.00197 |
| Haiku 4.5 | $0.00005 | $0.00098 |
Grade A, and why
imsg scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Health: `curl -s http://127.0.0.1:4793/healthz` and `launchctl print gui/501/com.joel.imsg-mcp`. Restart with `launchctl kickstart -k gui/501/com.joel.imsg-mcp`. The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago Changed · +14 lines abeb93d4c4f9
- 1mo ago First seen · 85 lines · 52 tokens per session scan A 67cdb5494c5f
imsg is a skill published in the GitHub repository joelhooks/joelclaw (64 stars, last pushed yesterday), with no licence file. It adds 52 tokens to every session and 984 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
c-messaging
Send and read messages via imsg (iMessage) and wacli (WhatsApp). Supports sending to individuals or groups, reading recent conversations, and checking unread messages across both platforms.
agent-inbox
Read and answer the messages people send your agent, and reach the person you're working for, via the Agent Inbox CLI (npx @agentinbox/cli inbox list|show|send|reply) or its MCP tools (inboxlist, inboxshow, inboxsend, inboxreply). Use it to pick up unread conversations in background/autonomous/scheduled runs, and when…
novu-design-workflow
Design notification workflows the Novu way — choose channels, set severity, decide when a workflow is critical, configure digests, and route based on subscriber state. Applies to BOTH dashboard-authored and code-first (@novu/framework) workflows. Use when planning a new workflow, deciding which channels to include…
novu-manage-preferences
Configure notification preferences in Novu at the workflow and subscriber level. Set default channel preferences (email, SMS, push, chat, in-app), mark preferences as read-only or subscriber-editable, and manage subscriber-specific overrides. Use when setting up notification opt-in/opt-out, configuring per-channel…
Chat Response Generator
Generate quick, effective responses for chat and messaging platforms.
c-slack
Send messages and upload files to Slack channels using the slack CLI. Supports direct messages, channel posts, file uploads, and thread replies.